Combined steam-generator and grate.



No. 773,420. PATENTED OCT. 25, 1904.

- J. O. RAYMOND. COMBINED STEAM GENERATOR AND GRATE.

APPLICATION FILED DEO.17, 1903.

WITNESSES:

A TTORN E 78 Patented October 25, 1904.

UNITED STATES PATENT OFEicE.

JOHN C. RAYMOND, OF NEW YORK, N. -Y.

COMBINED STEAM-GENERATOR AND GRATE.

SPECIFICATION forming part of Letters Patent No. 773,420, dated October25, 1904.

Application filed December 17, 1903- Serial No, 185,502. (No model.)

To a whom it may concern.-

Be it known that I, JOHN C. RAYMOND, a citi- Zen of the United States,and a resident of New York city, in the borough of Manhattan and Stateof New York, have made certain new and useful Improvements in a CombinedSteam-Generator and Grate, of which the following is a specification.

My invention is an improvement in steamgenerators, and has for anobject, among others, to provide a novel construction of combined grateand generator; andthe invention consists in certain novel constructionsand combinations of parts, as will be hereinafter described and claimed.

In the drawings, Figure 1 is a side elevation, partly in section, of anapparatus embodying myinvention. Fig. 2 is a top plan view thereof, andFig. .3 is a front elevation of the apparatus.

By my invention I seek to provide a grate in the form of a tube wound'helically, producing a cylindrical grate with the openings between thecoils of sufiicient size to permit the escape of ashes and at the sametime sufficiently small to retain the fuel when it is being burned.

It will be understood that my grate is designed for use with solidfuel-such as coal, coke, wood, or the like-and I make provision forintroducing the fuel and for removing cinders and the like from time totime, as may be necessary.

In the construction shown the grate A is composed of a series of coils Aof hollow tubing, preferably of copper or the like, adapted for thecirculation through the coil of water in order to secure the generationof steam in the coil. At its ends the coil A has its pipes brought tothe center and extended at A and A in line with the axis of the coil, itbeing proposed to introduce water through the extended end A of the coiland to conduct steam or hot water from the opposite end A couplingsbeing provided at B and C for the connection of the steam-delivery pipeB and the water-supply pipe C in the use of the invention.

The end portions A and A of the coil are journaled in suitable bearingsD and E, and

the free end of the grate is provided with a cross bar extendingtransversely across it at its middle and aifording hinge connections atI and J for the doors I and J, which may be secured at their free edgeswhen closed by any suitable form of latch z or as will be understoodfrom Figs. 1, 2, and 3 of the drawings. By providing these oppositedoors I and J access may be conveniently had to the interior of thecoil-grate, at the upper side thereof, for the purpose of introducingfuel or for any other purposes desired. I prefer to make the door insections I and J, as shown, as thereby access may be had to the upperportion of the fire in' the grate without disturbing the lower portion,as will be understood from Fig. 3.

By the described construction it will be noticed I provide a gratecomposed of helical coils adapted to contain the fuel and support it soit can be revolved from time to time in order to secure any desiredshaking action and which is provided at its open end with doors, so thefuel can be introduced and the fire may be manipulated in any desiredmanner. By revolving the grate I am also able to submit all portions ofthe coils to the direct action of the heat and so secure the bestresults from the fire.

In the construction before described I prefer to employ in connectionwith the coilgrate a supplemental generator in the form of coils K,extending transversely above the coil-grate, with the coils curved fromside to side to conform to the curvature of the coilgrate, saidsupplemental generator having an inlet-pipe K at one end for the waterand a discharge-pipe K at the other end for the generated steam or hotwater, which may be conducted to any suitable point. By means of thissupplemental generator I utilize any waste heat of the coil-grate, andit will be understood that this coil-grate may also be utilized forheating purposes or for cooking or otherwise, as may be desired.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an apparatus substantially as described the combination of thegrate composed of a pipe coiled helically and provided at its ends withportions in the axial line of the coils, bearings for said portionswhereby the grate is journaled so it can be revolved, couplingsconnecting said portions of the pipe with delivery and discharge pipes,means for closing one end of the coil-grate, a bar extending across theother end of the grate at the center thereof and doors hinged at theirinner edges to the opposite edges of the cross-bar, substantially as setforth.

2. A grate composed of coils forminga cylindrical grate adapted toreceive solid fuel and having end portions suitably journaled and a doorfor closing the open end of said grate and adapted to be opened topermit the introduction of fuel substantially as set forth.

3. A cylindrical grate composed of coils of pipe journaled at its ends,a bar crossing one end of the grate and doors hinged to the oppositeedges of the bar substantially as set forth.

t. A cylindrical grate composed of coils of pipe, means for closing oneend of the grate and doors for closing the other end of the grate andarranged in sections on opposite sides of the axial center of the grateas set forth.

5. A cylindrical grate composed of a hollow pipe disposed in helicalcoils and having at its ends axially-disposed portions, communieatingwith their respective ends of the grate, bearings for said portions,means for closing the ends of the grate including a door at one endarranged to be opened whereby to permit the introduction of fuelsubstantially as set forth.

JOHN G. RAYMOND.

\Vitnesses:

SoLoN (J. KmIoN, PERRY B. TURPIN.

